/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package com.sun.hunk.web.secure;

import com.sun.hunk.constant.RequestConstant;
import com.sun.hunk.constant.SessionConstant;
import com.sun.hunk.hibernate.dao.UserDAO;
import com.sun.hunk.hibernate.domain.User;
import java.io.IOException;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *
 * @author sunil
 */
public class Login extends HttpServlet {
   
    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");       
        try {
            String userName = request.getParameter(RequestConstant.USER_NAME);
            String password = request.getParameter(RequestConstant.PASSWORD);
            UserDAO dao = new UserDAO();
            //dao.getCurrentSession().beginTransaction();
            User user = dao.getUser(userName, password);
            //dao.getCurrentSession().close();
            RequestDispatcher rd = null;
            if(user == null){
                rd = request.getRequestDispatcher("/jsp/app/user/login.jsp");
                request.setAttribute(RequestConstant.ERROR, "UserName or Password is incorrect !");
            }else{
                rd = request.getRequestDispatcher("/jsp/index.jsp");
                request.getSession().setAttribute(SessionConstant.USER, user);
            }
            rd.forward(request, response);
        } catch(Exception e){
            e.printStackTrace();
        }
    } 

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        String invalidate = request.getParameter("invalidate");
        if("true".equalsIgnoreCase(invalidate)){
            request.getSession().invalidate();
            request.getSession().removeAttribute(SessionConstant.USER);
        }
//        response.sendRedirect("/jsp/login.jsp");
        request.getRequestDispatcher("/jsp/index.jsp").forward(request, response);
    } 

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
